ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.191 by root, Fri Oct 5 20:47:49 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
34		87
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	89	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	90	#endif
53	# include <limits.h>	91
54	# ifndef PAGESIZE	92	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	93	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	94	#endif
61	#endif
62		95
63	/* The next macro should declare a variable stacklevel that contains and approximation	96	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	97	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
68		105
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		107
		108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	#else
		112	# define attribute(x)
		113	# define BARRIER
		114	#endif
		115
		116	#define NOINLINE attribute ((noinline))
		117
71	#include "CoroAPI.h"	118	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		119
75	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	124	#else
80	# define LOCK (void)0	125	# define LOCK (void)0
81	# define UNLOCK (void)0	126	# define UNLOCK (void)0
82	#endif	127	#endif
83		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	142	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	143	static SV *coro_mortal; /* will be freed after next transfer */
88		144
		145	static GV *irsgv; /* $/ */
		146	static GV *stdoutgv; /* *STDOUT */
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
		153	static struct coro_cctx *cctx_first;
		154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		163	};
		164
89	/* this is a structure representing a c-level coroutine */	165	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	166	typedef struct coro_cctx {
91	struct coro_stack *next;	167	struct coro_cctx *next;
92		168
93	/* the stack */	169	/* the stack */
94	void *sptr;	170	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	171	size_t ssize;
96		172
97	/* cpu state */	173	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	174	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		175	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	176	JMPENV *top_env;
100	coro_context cctx;	177	coro_context cctx;
101	} coro_stack;
102		178
103	/* the (fake) coro_stack representing the main program */	179	#if CORO_USE_VALGRIND
104	static coro_stack *main_stack;	180	int valgrind_id;
		181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
105		191
106	/* this is a structure representing a perl-level coroutine */	192	/* this is a structure representing a perl-level coroutine */
107	struct coro {	193	struct coro {
108	/* the c coroutine allocated to this perl coroutine, if any */	194	/* the c coroutine allocated to this perl coroutine, if any */
109	coro_stack *stack;	195	coro_cctx *cctx;
110		196
111	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
112	AV *args;	198	AV *args;
113	int refcnt;	199	int refcnt;
		200	int flags; /* CF_ flags */
114		201
115	/* optionally saved, might be zero */	202	/* optionally saved, might be zero */
116	AV *defav;	203	AV *defav; /* @_ */
117	SV *defsv;	204	SV *defsv; /* $_ */
118	SV *errsv;	205	SV *errsv; /* $@ */
		206	SV *deffh; /* default filehandle */
		207	SV *irssv; /* $/ */
		208	SV *irssv_sv; /* real $/ cache */
119		209
120	/* saved global state not related to stacks */	210	#define VAR(name,type) type name;
121	U8 dowarn;	211	# include "state.h"
122	I32 in_eval;	212	#undef VAR
123		213
124	/* the stacks and related info (callchain etc..) */	214	/* statistics */
125	PERL_SI *curstackinfo;	215	int usecount; /* number of transfers to this coro */
126	AV *curstack;
127	AV *mainstack;
128	SV **stack_sp;
129	OP *op;
130	SV **curpad;
131	AV *comppad;
132	CV *compcv;
133	SV **stack_base;
134	SV **stack_max;
135	SV **tmps_stack;
136	I32 tmps_floor;
137	I32 tmps_ix;
138	I32 tmps_max;
139	I32 *markstack;
140	I32 *markstack_ptr;
141	I32 *markstack_max;
142	I32 *scopestack;
143	I32 scopestack_ix;
144	I32 scopestack_max;
145	ANY *savestack;
146	I32 savestack_ix;
147	I32 savestack_max;
148	OP **retstack;
149	I32 retstack_ix;
150	I32 retstack_max;
151	PMOP *curpm;
152	COP *curcop;
153		216
154	/* coro process data */	217	/* coro process data */
155	int prio;	218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro *next, *prev;
		226	HV *hv; /* the perl hash associated with this coro, if any */
156	};	227	};
157		228
158	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
160		231
		232	/** Coro ********************************************************************/
		233
		234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/** lowlevel stuff **********************************************************/
		248
161	static AV *	249	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	250	coro_clone_padlist (pTHX_ CV *cv)
163	{	251	{
164	AV *padlist = CvPADLIST (cv);	252	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	253	AV *newpadlist, *newpad;
166		254
167	newpadlist = newAV ();	255	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	256	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	257	#if PERL_VERSION_ATLEAST (5,9,0)
		258	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		259	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	260	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	261	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	262	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	263	--AvFILLp (padlist);
176		264
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	265	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		309
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		311
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
226	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
227	static void	348	static void
228	get_padlist (pTHX_ CV *cv)	349	get_padlist (pTHX_ CV *cv)
229	{	350	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
231		353
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	356	else
235	{	357	{
236	#if 0	358	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	359	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	360	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	361	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	362	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	363	SvREFCNT_dec (cp);
242	#else	364	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	368	}
247		369
248	static void	370	static void
249	put_padlist (pTHX_ CV *cv)	371	put_padlist (pTHX_ CV *cv)
250	{	372	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
252		375
253	if (!mg)	376	if (!mg)
254	{	377	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
259	}	382	}
260		383
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
262	}
263		385
264	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
265	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
266		388
267	#define LOAD(state) load_state(aTHX_ (state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	390	}
269		391
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/** load & save, init *******************************************************/
271		393
272	static void	394	static void
273	load_state(pTHX_ Coro__State c)	395	load_perl (pTHX_ Coro__State c)
274	{	396	{
275	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
276	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
277		400
278	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
279	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
280	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
281	PL_stack_sp = c->stack_sp;	404	GvSV (irsgv) = c->irssv_sv;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		405
313	{	406	{
314	dSP;	407	dSP;
315	CV *cv;	408	CV *cv;
316		409
317	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
319	{	412	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
326	}	415	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	416	}
330		417
331	PUTBACK;	418	PUTBACK;
332	}	419	}
333	}	420	}
334		421
335	static void	422	static void
336	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
337	{	424	{
338	{	425	{
339	dSP;	426	dSP;
340	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	431	/*
345	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
347	*/	434	*/
348		435
349	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
351	for (;;)	438	for (;;)
352	{	439	{
353	while (cxix >= 0)	440	while (cxix >= 0)
354	{	441	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
356		443
357	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
358	{	445	{
359	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
360	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
361	{	449	{
362	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
373		454
		455	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	456	get_padlist (aTHX_ cv);
375	}	457	}
376	}	458	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	459	}
386		460
387	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
388	break;	462	break;
389		463
390	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
391	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
392	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
393	}	467	}
394		468
395	PUTBACK;	469	PUTBACK;
396	}	470	}
397		471
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
401		476
402	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	478	# include "state.h"
404		479	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	}	480	}
436		481
437	/*	482	/*
438	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
440	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
441	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
442	*/	487	*/
		488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
443	static void	491	static void
444	coro_init_stacks (pTHX)	492	coro_init_stacks (pTHX)
445	{	493	{
446	LOCK;	494	PL_curstackinfo = new_stackinfo(64, 6);
447
448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
450	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452		498
453	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
454	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456		502
457	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
458	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
459	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
460	PL_tmps_max = 96;	506	PL_tmps_max = 64;
461		507
462	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
463	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
464	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
465		511
…		…
469		515
470	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
471	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
472	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
473		519
474	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
475	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
476	PL_savestack_max = 96;	522	PL_savestack_max = 64;
477		523
478	#if PERL_VERSION < 9	524	#if !PERL_VERSION_ATLEAST (5,9,0)
479	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
480	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
481	PL_retstack_max = 8;	527	PL_retstack_max = 4;
482	#endif	528	#endif
483
484	UNLOCK;
485	}	529	}
		530	#endif
486		531
487	/*	532	/*
488	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
489	*/	534	*/
490	static void	535	static void
491	destroy_stacks(pTHX)	536	coro_destroy_stacks (pTHX)
492	{	537	{
493	if (!IN_DESTRUCT)
494	{
495	/* is this ugly, I ask? */
496	LEAVE_SCOPE (0);
497
498	/* sure it is, but more important: is it correct?? :/ */
499	FREETMPS;
500
501	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502	}
503
504	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
505	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
506		540
507	while (PL_curstackinfo)	541	while (PL_curstackinfo)
508	{	542	{
509	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
510		544
511	{ /*D*//*remove*/
512	dSP;
513	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514	PUTBACK; /* possibly superfluous */
515	}
516
517	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
518	{
519	dounwind (-1);/*D*//*remove*/
520	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
521	}
522		547
523	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	550	PL_curstackinfo = p;
526	}	551	}
527		552
528	Safefree (PL_tmps_stack);	553	Safefree (PL_tmps_stack);
529	Safefree (PL_markstack);	554	Safefree (PL_markstack);
530	Safefree (PL_scopestack);	555	Safefree (PL_scopestack);
531	Safefree (PL_savestack);	556	Safefree (PL_savestack);
532	#if PERL_VERSION < 9	557	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree (PL_retstack);	558	Safefree (PL_retstack);
534	#endif	559	#endif
535	}	560	}
536		561
537	static void	562	static size_t
538	setup_coro (struct coro *coro)	563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
		570	{
		571	#define VAR(name,type)coro->name = PL_ ## name;
		572	# include "state.h"
		573	#undef VAR
		574	}
		575
		576	rss += sizeof (coro->curstackinfo);
		577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
		584
		585	#if !PERL_VERSION_ATLEAST (5,9,0)
		586	rss += coro->retstack_max * sizeof (OP *);
		587	#endif
		588	}
		589
		590	return rss;
		591	}
		592
		593	/** coroutine stack handling ************************************************/
		594
		595	static void
		596	coro_setup (pTHX_ struct coro *coro)
539	{	597	{
540	/*	598	/*
541	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
542	*/	600	*/
543	dTHX;	601	coro_init_stacks (aTHX);
		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
		606	PL_comppad = 0;
		607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	{
		620	dSP;
		621	LOGOP myop;
		622
		623	Zero (&myop, 1, LOGOP);
		624	myop.op_next = Nullop;
		625	myop.op_flags = OPf_WANT_VOID;
		626
		627	PUSHMARK (SP);
		628	XPUSHs (av_shift (GvAV (PL_defgv)));
		629	PUTBACK;
		630	PL_op = (OP *)&myop;
		631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		632	SPAGAIN;
		633	}
		634
		635	ENTER; /* necessary e.g. for dounwind */
		636	}
		637
		638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
		672	free_coro_mortal (pTHX)
		673	{
		674	if (coro_mortal)
		675	{
		676	SvREFCNT_dec (coro_mortal);
		677	coro_mortal = 0;
		678	}
		679	}
		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
		807	static void NOINLINE
		808	prepare_cctx (pTHX_ coro_cctx *cctx)
		809	{
544	dSP;	810	dSP;
545	UNOP myop;	811	LOGOP myop;
546	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547		812
548	coro_init_stacks (aTHX);	813	PL_top_env = &PL_start_env;
549	/*PL_curcop = 0;*/
550	/*PL_in_eval = PL_in_eval;*/ /* inherit */
551	SvREFCNT_dec (GvAV (PL_defgv));
552	GvAV (PL_defgv) = coro->args; coro->args = 0;
553		814
554	SPAGAIN;	815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
555		817
556	Zero (&myop, 1, UNOP);	818	Zero (&myop, 1, LOGOP);
557	myop.op_next = Nullop;	819	myop.op_next = PL_op;
558	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559		821
		822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		826	PUTBACK;
560	PL_op = (OP *)&myop;	827	PL_op = (OP *)&myop;
561
562	PUSHMARK(SP);
563	XPUSHs (sub_init);
564	PUTBACK;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	829	SPAGAIN;
567
568	ENTER; /* necessary e.g. for dounwind */
569	}	830	}
570		831
571	static void	832	/*
572	free_coro_mortal ()	833	* this is a _very_ stripped down perl interpreter ;)
573	{	834	*/
574	if (coro_mortal)
575	{
576	SvREFCNT_dec (coro_mortal);
577	coro_mortal = 0;
578	}
579	}
580
581	static void	835	static void
582	coro_run (void *arg)	836	coro_run (void *arg)
583	{	837	{
		838	dTHX;
		839
		840	/* coro_run is the alternative tail of transfer(), so unlock here. */
		841	UNLOCK;
		842
		843	/* we now skip the entersub that lead to transfer() */
		844	PL_op = PL_op->op_next;
		845
		846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
584	/*	853	/*
585	* this is a _very_ stripped down perl interpreter ;)	854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
586	*/	859	*/
587	dTHX;
588	int ret;
589
590	UNLOCK;
591
592	PL_top_env = &PL_start_env;	860	PL_top_env = main_top_env;
593		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597	/* continue at cctx_init, without entersub */
598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600	/* somebody will hit me for both perl_run and PL_restartop */
601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602	printf ("ret %d\n", ret);//D
603
604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605	abort ();
606	}	862	}
607		863
608	static coro_stack *	864	static coro_cctx *
609	stack_new ()	865	cctx_new ()
610	{	866	{
611	coro_stack *stack;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
612		870
		871	++cctx_count;
		872
613	New (0, stack, 1, coro_stack);	873	Newz (0, cctx, 1, coro_cctx);
614		874
615	#if HAVE_MMAP	875	#if HAVE_MMAP
616		876
617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
618	/* mmap suppsedly does allocate-on-write for us */	878	/* mmap supposedly does allocate-on-write for us */
619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620		880
621	if (stack->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
622	{
623	perror ("FATAL: unable to mmap stack for coroutine");
624	_exit (EXIT_FAILURE);
625	}	882	{
626
627	# if STACKGUARD	883	# if CORO_STACKGUARD
628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
629	# endif	885	# endif
630		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
631	#else	887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
632		888	cctx->flags |= CC_MAPPED;
633	stack->ssize = STACKSIZE * (long)sizeof (long);
634	New (0, stack->sptr, STACKSIZE, long);
635
636	if (!stack->sptr)
637	{	889	}
		890	else
		891	#endif
		892	{
		893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
		895
		896	if (!cctx->sptr)
		897	{
638	perror (stderr, "FATAL: unable to malloc stack for coroutine");	898	perror ("FATAL: unable to allocate stack for coroutine");
639	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
640	}	900	}
641		901
642	#endif	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
643		905
		906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
645		908
646	return stack;	909	return cctx;
647	}	910	}
648		911
649	static void	912	static void
650	stack_free (coro_stack *stack)	913	cctx_destroy (coro_cctx *cctx)
651	{	914	{
652	if (!stack || stack == main_stack)	915	if (!cctx)
653	return;	916	return;
654		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
655	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
656	munmap (stack->sptr, stack->ssize);	926	munmap (cctx->sptr, cctx->ssize);
657	#else
658	Safefree (stack->sptr);
659	#endif
660
661	Safefree (stack);
662	}
663
664	static coro_stack *stack_first;
665
666	static coro_stack *
667	stack_get ()
668	{
669	coro_stack *stack;
670
671	if (stack_first)
672	{
673	stack = stack_first;
674	stack_first = stack->next;
675	}
676	else	927	else
		928	#endif
		929	Safefree (cctx->sptr);
		930
		931	Safefree (cctx);
		932	}
		933
		934	static coro_cctx *
		935	cctx_get (pTHX)
		936	{
		937	while (cctx_first)
677	{	938	{
678	stack = stack_new ();	939	coro_cctx *cctx = cctx_first;
679	PL_op = PL_op->op_next;	940	cctx_first = cctx->next;
		941	--cctx_idle;
		942
		943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		944	return cctx;
		945
		946	cctx_destroy (cctx);
680	}	947	}
681		948
682	return stack;	949	return cctx_new ();
683	}	950	}
684		951
685	static void	952	static void
686	stack_put (coro_stack *stack)	953	cctx_put (coro_cctx *cctx)
687	{	954	{
688	stack->next = stack_first;	955	/* free another cctx if overlimit */
689	stack_first = stack;	956	if (cctx_idle >= MAX_IDLE_CCTX)
690	}	957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
691		961
692	/* never call directly, always through the coro_state_transfer global variable */	962	cctx_destroy (first);
693	static void	963	}
		964
		965	++cctx_idle;
		966	cctx->next = cctx_first;
		967	cctx_first = cctx;
		968	}
		969
		970	/** coroutine switching *****************************************************/
		971
		972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
694	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	994	{
696	dSTACKLEVEL;	995	dSTACKLEVEL;
697		996
698	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
699	if (flags == TRANSFER_SET_STACKLEVEL)	998	if (!next)
		999	{
700	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1002	}
701	else if (prev != next)	1003	else if (prev != next)
702	{	1004	{
703	coro_stack *prev__stack;	1005	coro_cctx *prev__cctx;
		1006
		1007	if (prev->flags & CF_NEW)
		1008	{
		1009	/* create a new empty context */
		1010	Newz (0, prev->cctx, 1, coro_cctx);
		1011	prev->flags &= ~CF_NEW;
		1012	prev->flags |= CF_RUNNING;
		1013	}
		1014
		1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags |= CF_RUNNING;
704		1017
705	LOCK;	1018	LOCK;
706		1019
707	if (next->mainstack)	1020	if (next->flags & CF_NEW)
708	{	1021	{
709	/* coroutine already started */	1022	/* need to start coroutine */
710	SAVE (prev, flags);	1023	next->flags &= ~CF_NEW;
711	LOAD (next);	1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
712	}	1028	}
713	else	1029	else
714	{	1030	{
715	/* need to start coroutine */	1031	/* coroutine already started */
716	/* first get rid of the old state */	1032	save_perl (aTHX_ prev);
717	SAVE (prev, -1);	1033	load_perl (aTHX_ next);
718	/* setup coroutine call */
719	setup_coro (next);
720	/* need a stack */
721	next->stack = 0;
722	}	1034	}
723		1035
724	prev__stack = prev->stack;	1036	prev__cctx = prev->cctx;
725		1037
726	/* possibly "free" the stack */	1038	/* possibly "free" the cctx */
727	if (prev__stack->idle_sp == STACKLEVEL)	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
728	{	1040	{
729	stack_put (prev__stack);	1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1043
730	prev->stack = 0;	1044	prev->cctx = 0;
		1045
		1046	cctx_put (prev__cctx);
731	}	1047	}
732		1048
		1049	++next->usecount;
		1050
733	if (!next->stack)	1051	if (!next->cctx)
734	next->stack = stack_get ();	1052	next->cctx = cctx_get (aTHX);
735		1053
736	if (prev__stack != next->stack)	1054	if (prev__cctx != next->cctx)
737	{	1055	{
738	prev__stack->top_env = PL_top_env;	1056	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->stack->top_env;	1057	PL_top_env = next->cctx->top_env;
740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	1059	}
743		1060
744	free_coro_mortal ();	1061	free_coro_mortal (aTHX);
745
746	UNLOCK;	1062	UNLOCK;
747	}	1063	}
748	}	1064	}
749		1065
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args	1066	struct transfer_args
756	{	1067	{
757	struct coro *prev, *next;	1068	struct coro *prev, *next;
758	int flags;
759	};	1069	};
760		1070
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
762		1073
		1074	/** high level stuff ********************************************************/
		1075
763	static void	1076	static int
764	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
765	{	1078	{
766	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
767	return;	1080	return 0;
		1081
		1082	coro->flags |= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
		1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		1094
769	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	1096	{
771	struct coro temp;	1097	struct coro temp;
772		1098
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1099	if (coro->flags & CF_RUNNING)
		1100	croak ("FATAL: tried to destroy currently running coroutine");
		1101
		1102	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	1103	load_perl (aTHX_ coro);
775		1104
776	destroy_stacks (aTHX);	1105	coro_destroy (aTHX_ coro);
777		1106
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
779		1108
780	coro->mainstack = 0;	1109	coro->mainstack = 0;
781	}	1110	}
782		1111
783	stack_free (coro->stack);	1112	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
785	Safefree (coro);	1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
786	}	1120	}
787		1121
788	static int	1122	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	1124	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	1125	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
793		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
794	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
795		1135
796	return 0;	1136	return 0;
797	}	1137	}
798		1138
799	static int	1139	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1140	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	1141	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1142	struct coro *coro = (struct coro *)mg->mg_ptr;
803		1143
804	++coro->refcnt;	1144	++coro->refcnt;
805		1145
806	return 0;	1146	return 0;
807	}	1147	}
808		1148
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1149	static MGVTBL coro_state_vtbl = {
		1150	0, 0, 0, 0,
		1151	coro_state_free,
		1152	0,
		1153	#ifdef MGf_DUP
		1154	coro_state_dup,
		1155	#else
		1156	# define MGf_DUP 0
		1157	#endif
		1158	};
810		1159
811	static struct coro *
812	SvSTATE (SV *coro)
813	{
814	HV *stash;
815	MAGIC *mg;
816
817	if (SvROK (coro))
818	coro = SvRV (coro);
819
820	stash = SvSTASH (coro);
821	if (stash != coro_stash && stash != coro_state_stash)
822	{
823	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");
826	}
827
828	mg = SvMAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;
831	}
832
833	static void	1160	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	1162	{
836	ta->prev = SvSTATE (prev);	1163	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	1164	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;	1165	TRANSFER_CHECK (*ta);
839	}	1166	}
840		1167
841	static void	1168	static void
842	api_transfer (SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1170	{
844	dTHX;	1171	dTHX;
845	struct transfer_args ta;	1172	struct transfer_args ta;
846		1173
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	1175	TRANSFER (ta);
849	}	1176	}
850		1177
851	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
852		1179
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	1180	static void
866	coro_enq (pTHX_ SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
867	{	1182	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1184	}
878		1185
879	static SV *	1186	static SV *
880	coro_deq (pTHX_ int min_prio)	1187	coro_deq (pTHX_ int min_prio)
881	{	1188	{
…		…
885	if (min_prio < 0)	1192	if (min_prio < 0)
886	min_prio = 0;	1193	min_prio = 0;
887		1194
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
893	}
894		1198
895	return 0;	1199	return 0;
896	}	1200	}
897		1201
898	static void	1202	static int
899	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
900	{	1204	{
901	dTHX;	1205	dTHX;
		1206	struct coro *coro;
902		1207
903	if (SvROK (coro))	1208	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1209	coro_sv = SvRV (coro_sv);
		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags |= CF_READY;
905		1217
906	LOCK;	1218	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
908	UNLOCK;	1221	UNLOCK;
909	}
910		1222
		1223	return 1;
		1224	}
		1225
911	static void	1226	static int
		1227	api_is_ready (SV *coro_sv)
		1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1234	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1235	{
914	SV *current, *prev, *next;	1236	SV *prev_sv, *next_sv;
		1237
		1238	for (;;)
		1239	{
		1240	LOCK;
		1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
		1273	UNLOCK;
		1274	break;
		1275	}
		1276
		1277	/* free this only after the transfer */
		1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
915		1284
916	LOCK;	1285	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1286	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1287	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1288	UNLOCK;
958	}	1289	}
959		1290
960	static void	1291	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1292	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1293	{
963	LOCK;	1294	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
968	}	1310	}
969		1311
970	static void	1312	static void
971	api_schedule (void)	1313	api_schedule (void)
972	{	1314	{
973	dTHX;	1315	dTHX;
974	struct transfer_args ta;	1316	struct transfer_args ta;
975		1317
976	prepare_schedule (&ta);	1318	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1319	TRANSFER (ta);
978	}	1320	}
979		1321
980	static void	1322	static int
981	api_cede (void)	1323	api_cede (void)
982	{	1324	{
983	dTHX;	1325	dTHX;
984	struct transfer_args ta;	1326	struct transfer_args ta;
985		1327
986	prepare_cede (&ta);	1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
987	TRANSFER (ta);	1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
988	}	1337	}
989		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
990	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991		1381
992	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
993		1383
994	BOOT:	1384	BOOT:
995	{	1385	{
996	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
997	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
998	#endif	1388	#endif
999	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
1000		1390
		1391	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1392	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1393
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1395
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006		1400
1007	main_mainstack = PL_mainstack;	1401	main_mainstack = PL_mainstack;
		1402	main_top_env = PL_top_env;
		1403
		1404	while (main_top_env->je_prev)
		1405	main_top_env = main_top_env->je_prev;
1008		1406
1009	coroapi.ver = CORO_API_VERSION;	1407	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1408	coroapi.transfer = api_transfer;
1011
1012	Newz (0, main_stack, 1, coro_stack);
1013	main_stack->idle_sp = (void *)-1;
1014		1409
1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1410	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016	}	1411	}
1017		1412
1018	SV *	1413	SV *
…		…
1022	struct coro *coro;	1417	struct coro *coro;
1023	HV *hv;	1418	HV *hv;
1024	int i;	1419	int i;
1025		1420
1026	Newz (0, coro, 1, struct coro);	1421	Newz (0, coro, 1, struct coro);
1027	coro->args = newAV ();	1422	coro->args = newAV ();
		1423	coro->flags = CF_NEW;
1028		1424
		1425	if (coro_first) coro_first->prev = coro;
		1426	coro->next = coro_first;
		1427	coro_first = coro;
		1428
1029	hv = newHV ();	1429	coro->hv = hv = newHV ();
1030	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1430	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1431	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032		1432
1033	for (i = 1; i < items; i++)	1433	for (i = 1; i < items; i++)
1034	av_push (coro->args, newSVsv (ST (i)));	1434	av_push (coro->args, newSVsv (ST (i)));
1035
1036	coro->stack = main_stack;
1037	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1038	/*coro->stack = 0;*/
1039	}	1435	}
1040	OUTPUT:	1436	OUTPUT:
1041	RETVAL	1437	RETVAL
1042		1438
		1439	# these not obviously related functions are all rolled into the same xs
		1440	# function to increase chances that they all will call transfer with the same
		1441	# stack offset
1043	void	1442	void
1044	_set_stacklevel (...)	1443	_set_stacklevel (...)
1045	ALIAS:	1444	ALIAS:
1046	Coro::State::transfer = 1	1445	Coro::State::transfer = 1
1047	Coro::schedule = 2	1446	Coro::schedule = 2
1048	Coro::cede = 3	1447	Coro::cede = 3
1049	Coro::Cont::yield = 4	1448	Coro::cede_notself = 4
1050	CODE:	1449	CODE:
1051	{	1450	{
1052	struct transfer_args ta;	1451	struct transfer_args ta;
1053		1452
1054	switch (ix)	1453	switch (ix)
1055	{	1454	{
1056	case 0:	1455	case 0:
1057	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1456	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058	ta.next = 0;	1457	ta.next = 0;
1059	ta.flags = TRANSFER_SET_STACKLEVEL;
1060	break;	1458	break;
1061		1459
1062	case 1:	1460	case 1:
1063	if (items != 3)	1461	if (items != 2)
1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1462	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065		1463
1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1464	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1067	break;	1465	break;
1068		1466
1069	case 2:	1467	case 2:
1070	prepare_schedule (&ta);	1468	prepare_schedule (aTHX_ &ta);
1071	break;	1469	break;
1072		1470
1073	case 3:	1471	case 3:
1074	prepare_cede (&ta);	1472	prepare_cede (aTHX_ &ta);
1075	break;	1473	break;
1076		1474
1077	case 4:	1475	case 4:
1078	{	1476	if (!prepare_cede_notself (aTHX_ &ta))
1079	SV *yieldstack;	1477	XSRETURN_EMPTY;
1080	SV *sv;
1081	AV *defav = GvAV (PL_defgv);
1082		1478
1083	yieldstack = *hv_fetch (
1084	(HV *)SvRV (GvSV (coro_current)),
1085	"yieldstack", sizeof ("yieldstack") - 1,
1086	0
1087	);
1088
1089	/* set up @_ -- ugly */
1090	av_clear (defav);
1091	av_fill (defav, items - 1);
1092	while (items--)
1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095	sv = av_pop ((AV *)SvRV (yieldstack));
1096	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098	ta.flags = 0;
1099	SvREFCNT_dec (sv);
1100	}
1101	break;	1479	break;
1102
1103	}	1480	}
1104		1481
		1482	BARRIER;
1105	TRANSFER (ta);	1483	TRANSFER (ta);
1106	}
1107		1484
1108	void	1485	if (GIMME_V != G_VOID && ta.next != ta.prev)
1109	_clone_state_from (SV *dst, SV *src)	1486	XSRETURN_YES;
		1487	}
		1488
		1489	bool
		1490	_destroy (SV *coro_sv)
1110	CODE:	1491	CODE:
1111	{	1492	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112	struct coro *coro_src = SvSTATE (src);	1493	OUTPUT:
1113		1494	RETVAL
1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116	++coro_src->refcnt;
1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118	}
1119
1120	void
1121	_nonlocal_goto (IV nextop)
1122	CODE:
1123	/* uuh, somebody will kill me again for this */
1124	PL_op->op_next = INT2PTR (OP *, nextop);
1125		1495
1126	void	1496	void
1127	_exit (code)	1497	_exit (code)
1128	int code	1498	int code
1129	PROTOTYPE: $	1499	PROTOTYPE: $
1130	CODE:	1500	CODE:
1131	_exit (code);	1501	_exit (code);
1132		1502
		1503	int
		1504	cctx_stacksize (int new_stacksize = 0)
		1505	CODE:
		1506	RETVAL = coro_stacksize;
		1507	if (new_stacksize)
		1508	coro_stacksize = new_stacksize;
		1509	OUTPUT:
		1510	RETVAL
		1511
		1512	int
		1513	cctx_count ()
		1514	CODE:
		1515	RETVAL = cctx_count;
		1516	OUTPUT:
		1517	RETVAL
		1518
		1519	int
		1520	cctx_idle ()
		1521	CODE:
		1522	RETVAL = cctx_idle;
		1523	OUTPUT:
		1524	RETVAL
		1525
		1526	void
		1527	list ()
		1528	PPCODE:
		1529	{
		1530	struct coro *coro;
		1531	for (coro = coro_first; coro; coro = coro->next)
		1532	if (coro->hv)
		1533	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1534	}
		1535
		1536	void
		1537	call (Coro::State coro, SV *coderef)
		1538	ALIAS:
		1539	eval = 1
		1540	CODE:
		1541	{
		1542	if (coro->mainstack)
		1543	{
		1544	struct coro temp;
		1545	Zero (&temp, 1, struct coro);
		1546
		1547	if (!(coro->flags & CF_RUNNING))
		1548	{
		1549	save_perl (aTHX_ &temp);
		1550	load_perl (aTHX_ coro);
		1551	}
		1552
		1553	{
		1554	dSP;
		1555	ENTER;
		1556	SAVETMPS;
		1557	PUSHMARK (SP);
		1558	PUTBACK;
		1559	if (ix)
		1560	eval_sv (coderef, 0);
		1561	else
		1562	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1563	SPAGAIN;
		1564	FREETMPS;
		1565	LEAVE;
		1566	PUTBACK;
		1567	}
		1568
		1569	if (!(coro->flags & CF_RUNNING))
		1570	{
		1571	save_perl (aTHX_ coro);
		1572	load_perl (aTHX_ &temp);
		1573	}
		1574	}
		1575	}
		1576
		1577	SV *
		1578	is_ready (Coro::State coro)
		1579	PROTOTYPE: $
		1580	ALIAS:
		1581	is_ready = CF_READY
		1582	is_running = CF_RUNNING
		1583	is_new = CF_NEW
		1584	is_destroyed = CF_DESTROYED
		1585	CODE:
		1586	RETVAL = boolSV (coro->flags & ix);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	void
		1591	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1592
		1593	SV *
		1594	has_stack (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = boolSV (!!coro->cctx);
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	int
		1602	is_traced (Coro::State coro)
		1603	PROTOTYPE: $
		1604	CODE:
		1605	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1606	OUTPUT:
		1607	RETVAL
		1608
		1609	IV
		1610	rss (Coro::State coro)
		1611	PROTOTYPE: $
		1612	ALIAS:
		1613	usecount = 1
		1614	CODE:
		1615	switch (ix)
		1616	{
		1617	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1618	case 1: RETVAL = coro->usecount; break;
		1619	}
		1620	OUTPUT:
		1621	RETVAL
		1622
		1623
1133	MODULE = Coro::State PACKAGE = Coro	1624	MODULE = Coro::State PACKAGE = Coro
1134		1625
1135	BOOT:	1626	BOOT:
1136	{	1627	{
1137	int i;	1628	int i;
		1629
		1630	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1631	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1632	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1633
		1634	coro_current = get_sv ("Coro::current", FALSE);
		1635	SvREADONLY_on (coro_current);
1138		1636
1139	coro_stash = gv_stashpv ("Coro", TRUE);	1637	coro_stash = gv_stashpv ("Coro", TRUE);
1140		1638
1141	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1639	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1142	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1640	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1641	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1642	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1643	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1644	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147		1645
1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1646	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152	coro_ready[i] = newAV ();	1647	coro_ready[i] = newAV ();
1153		1648
1154	{	1649	{
1155	SV *sv = perl_get_sv("Coro::API", 1);	1650	SV *sv = perl_get_sv("Coro::API", 1);
1156		1651
1157	coroapi.schedule = api_schedule;	1652	coroapi.schedule = api_schedule;
1158	coroapi.cede = api_cede;	1653	coroapi.cede = api_cede;
		1654	coroapi.cede_notself = api_cede_notself;
1159	coroapi.ready = api_ready;	1655	coroapi.ready = api_ready;
		1656	coroapi.is_ready = api_is_ready;
1160	coroapi.nready = &coro_nready;	1657	coroapi.nready = &coro_nready;
1161	coroapi.current = coro_current;	1658	coroapi.current = coro_current;
1162		1659
1163	GCoroAPI = &coroapi;	1660	GCoroAPI = &coroapi;
1164	sv_setiv (sv, (IV)&coroapi);	1661	sv_setiv (sv, (IV)&coroapi);
1165	SvREADONLY_on (sv);	1662	SvREADONLY_on (sv);
1166	}	1663	}
1167	}	1664	}
		1665
		1666	void
		1667	_set_current (SV *current)
		1668	PROTOTYPE: $
		1669	CODE:
		1670	SvREFCNT_dec (SvRV (coro_current));
		1671	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168		1672
1169	int	1673	int
1170	prio (Coro::State coro, int newprio = 0)	1674	prio (Coro::State coro, int newprio = 0)
1171	ALIAS:	1675	ALIAS:
1172	nice = 1	1676	nice = 1
…		…
1175	RETVAL = coro->prio;	1679	RETVAL = coro->prio;
1176		1680
1177	if (items > 1)	1681	if (items > 1)
1178	{	1682	{
1179	if (ix)	1683	if (ix)
1180	newprio += coro->prio;	1684	newprio = coro->prio - newprio;
1181		1685
1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1686	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1687	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184		1688
1185	coro->prio = newprio;	1689	coro->prio = newprio;
1186	}	1690	}
1187	}	1691	}
		1692	OUTPUT:
		1693	RETVAL
1188		1694
1189	void	1695	SV *
1190	ready (SV *self)	1696	ready (SV *self)
1191	PROTOTYPE: $	1697	PROTOTYPE: $
1192	CODE:	1698	CODE:
1193	api_ready (self);	1699	RETVAL = boolSV (api_ready (self));
		1700	OUTPUT:
		1701	RETVAL
1194		1702
1195	int	1703	int
1196	nready (...)	1704	nready (...)
1197	PROTOTYPE:	1705	PROTOTYPE:
1198	CODE:	1706	CODE:
1199	RETVAL = coro_nready;	1707	RETVAL = coro_nready;
1200	OUTPUT:	1708	OUTPUT:
1201	RETVAL	1709	RETVAL
1202		1710
		1711	# for async_pool speedup
		1712	void
		1713	_pool_1 (SV *cb)
		1714	CODE:
		1715	{
		1716	struct coro *coro = SvSTATE (coro_current);
		1717	HV *hv = (HV *)SvRV (coro_current);
		1718	AV *defav = GvAV (PL_defgv);
		1719	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1720	AV *invoke_av;
		1721	int i, len;
		1722
		1723	if (!invoke)
		1724	croak ("\3terminate\2\n");
		1725
		1726	SvREFCNT_dec (coro->saved_deffh);
		1727	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1728
		1729	hv_store (hv, "desc", sizeof ("desc") - 1,
		1730	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1731
		1732	invoke_av = (AV *)SvRV (invoke);
		1733	len = av_len (invoke_av);
		1734
		1735	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1736
		1737	if (len > 0)
		1738	{
		1739	av_fill (defav, len - 1);
		1740	for (i = 0; i < len; ++i)
		1741	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1742	}
		1743
		1744	SvREFCNT_dec (invoke);
		1745	}
		1746
		1747	void
		1748	_pool_2 (SV *cb)
		1749	CODE:
		1750	{
		1751	struct coro *coro = SvSTATE (coro_current);
		1752
		1753	sv_setsv (cb, &PL_sv_undef);
		1754
		1755	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1756	coro->saved_deffh = 0;
		1757
		1758	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1759	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1760	croak ("\3terminate\2\n");
		1761
		1762	av_clear (GvAV (PL_defgv));
		1763	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1764	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1765
		1766	coro->prio = 0;
		1767
		1768	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1769	api_trace (coro_current, 0);
		1770
		1771	av_push (av_async_pool, newSVsv (coro_current));
		1772	}
		1773
		1774
1203	MODULE = Coro::State PACKAGE = Coro::AIO	1775	MODULE = Coro::State PACKAGE = Coro::AIO
1204		1776
1205	SV *	1777	SV *
1206	_get_state ()	1778	_get_state ()
1207	CODE:	1779	CODE:
1208	{	1780	{
1209	struct {	1781	struct io_state *data;
1210	int errorno;
1211	int laststype;
1212	int laststatval;
1213	Stat_t statcache;
1214	} data;
1215		1782
		1783	RETVAL = newSV (sizeof (struct io_state));
		1784	data = (struct io_state *)SvPVX (RETVAL);
		1785	SvCUR_set (RETVAL, sizeof (struct io_state));
		1786	SvPOK_only (RETVAL);
		1787
1216	data.errorno = errno;	1788	data->errorno = errno;
1217	data.laststype = PL_laststype;	1789	data->laststype = PL_laststype;
1218	data.laststatval = PL_laststatval;	1790	data->laststatval = PL_laststatval;
1219	data.statcache = PL_statcache;	1791	data->statcache = PL_statcache;
1220
1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
1222	}	1792	}
1223	OUTPUT:	1793	OUTPUT:
1224	RETVAL	1794	RETVAL
1225		1795
1226	void	1796	void
1227	_set_state (char *data_)	1797	_set_state (char *data_)
1228	PROTOTYPE: $	1798	PROTOTYPE: $
1229	CODE:	1799	CODE:
1230	{	1800	{
1231	struct {	1801	struct io_state *data = (void *)data_;
1232	int errorno;
1233	int laststype;
1234	int laststatval;
1235	Stat_t statcache;
1236	} *data = (void *)data_;
1237		1802
1238	errno = data->errorno;	1803	errno = data->errorno;
1239	PL_laststype = data->laststype;	1804	PL_laststype = data->laststype;
1240	PL_laststatval = data->laststatval;	1805	PL_laststatval = data->laststatval;
1241	PL_statcache = data->statcache;	1806	PL_statcache = data->statcache;
1242	}	1807	}
		1808

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines